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Technical Report for the INTC and ISCC Meetings 16 th November 2009 Richard Catherall EN-STI-RBS

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Outline Operations throughout 2009 Targets REX Operation, Linac consolidation RILIS Incidents Robot failure, operations Safety Safety Audit New Procedures, Alara, DIMR 2009/2010 Shutdown Planning HRS Front End #3 exchange Vacuum controls consolidation News from support groups HIE- ISOLDE Status

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Targets Target Production Production of 23 targets, 12 UC2-C. VADIS Versatile Arc Discharge Ion Source. Operated successfully during 2009 Adapted to different variants of ion sources/transfer lines. Generated interest at other institutes BeO target with n_converter for 6 He production Successful tests at the beginning of the year GdB6 line for laser ionization of Nd See presentation by T. Stora at ISOLDE Workshop. Target drawings updated to Catia Models used for simulations and developments

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REX campaign 2009 (1) 72 Kr MINIBALL Coulex/shape measu. 2.85 MeV/u 9-gap vacuum failure: run cancelled (2) 94,96 Kr MINIBALL Coulex 2.85 MeV/u Isolde vacuum failure half way through the run (3) 62 Mn/Fe MINIBALL Coulex 2.86 MeV/u -> Fe isotopes produced by in-trap decay of Mn PSB problems + linac RF (24h stop) (4) 138 Xe MINIBALL Coulex/g-factor meas. 2.87 MeV/u (5) 29,30 Na MINIBALL Coulex 2.85 MeV/u (6) 200 Po MINIBALL Coulex/shape measu. 2.85 MeV/u -> Heavy beam 5% low energy eff. (7) 107,109 Sn MINIBALL Coulex energy 2.85 MeV/u -> long run: 10 days (8) 11 Be Transfer reactions at MINIBALL 2.86 MeV/u -> stripping foils + isotopically pure buffer gas Cathode failure during setup (9) 66 Ni Transfer reactions at MINIBALL 2.9 MeV/u -> long run: 10 days * A number of failures: one run cancelled several runs hampered by problems * Despite all problems we managed to deliver beams to (almost) all users * Some promising results: 200 Po, in-trap decay, transfer reaction of 66 Ni Courtesy of D. Voulot & F. Wenander

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REXTRAP control system upgrade Now foreseen for 2010-2011 shutdown All groups agree; detailed specification discussions ongoing PAM - new PicoAmpere Meter for REXTRAP tested In-house production by BE-BI Variable integration time, noise level few 100 fA, very promising To be implemented with the REXTRAP upgrade REX separator shielding to WITCH magnetic field Tested beam transport and A/q-scaling with B-field on transport can work for limited B-field with large steering A/q-scaling does not work => WITCH magnet should not be energized while REX is setting up or delivering radioactive beam Mass resolution tests finished + new in-trap decay results See D. Voulots talk at the ISOLDE workshop REX-Low energy Courtesy of D. Voulot & F. Wenander

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REX - Linac consolidation I Linac RF cooling and ventilation New ventilation for the RF room + Modification of RF amplifier (water cooling with heat exchangers) -> improve temperature stability + cleanliness -> longer RF tube lifetime (25kCHF/piece) Linac shielding Construction of shielding tunnel around the linac -> remove lead boxes on cavities -> faster and easier access to equipment -> less X-ray background at Miniball Courtesy of D. Voulot & F. Wenander

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Linac consolidation II Beam instrumentation controls Replace old control system (RS485, MS Visual Basic Windows based system) with control server based on VME crate + dedicated VME cards -> CERN standard (piquet support, easier to maintain) -> modular system (possibility of extension and modifications) New tuner mechanics for the 7-gaps Improve reliability and stability -> less RF interruptions -> under construction (maybe installed next year) Courtesy of D. Voulot & F. Wenander

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Polarized beams Beta-NMR setup from HMI Berlin Now under installation after REX Preliminary installed after 2 nd beam-line magnet sample chamber scintillators, light guides and PM tubes vacuum system electronics beam-line quadrupole magnet Tests foreseen for June 2010 Mobile Tilted Foil Setup at 2 nd beam line Stepper motor operational for foil inclination/rotation New larger foils arrived (40x12 mm2) Initial test scheduled for week 48 Coulex of stable polarized 21Ne Use Miniball particle and gamma detectors Courtesy of D. Voulot & F. Wenander

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New Nd:YAG lasers at ISOLDE RILIS Copper Vapor Lasers are replaced by Diode Pumped Solid State Nd:YAG Lasers Laser generates 3 beams at 10 kHz: Main green beam 532nm, 70-80 W, 8 ns Residual green beam 532 nm, 12-28 W, 9 ns UV beam - 355 nm, 18-20 W, 11 ns Main green beam Residual green beam UV beam Two lasers are available: one in use, second as a backup Courtesy of V. Fedosseev

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RILIS operation in 1994-2009 2143 h - total 1994 h - on-line In 2009 Nd:YAG lasers have been used for ALL 14 RILIS runs Be, Ga, Ag, Nd, Po, Mn, Mg, Po, Sn, Mg, Mn, Be, Zn, Ni Laser ON time in 2009: Courtesy of V. Fedosseev

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A new RILIS scheme for manganese - LARIS result Replacement of the scheme which uses the CVL green beam. Fortuitous Auto-ionizing transition at CVL wavelength Fortuitous Auto-ionizing transition at CVL wavelength Outcome of RIS study of Mn at LARIS: Many new auto-ionizing states found Various promising Nd:YAG based schemes tested New scheme applied at RILIS Efficiency > 8 % Outcome of RIS study of Mn at LARIS: Many new auto-ionizing states found Various promising Nd:YAG based schemes tested New scheme applied at RILIS Efficiency > 8 % AIS search at LARIS Courtesy of V. Fedosseev

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Correct target pick upTarget #407 failed pick-up Robot Incidents HRS Robot failed to pick up target correctly and became jammed at Front End. This after failing 2 weeks earlier. Human intervention required to retrieve situation. High collective and individual dose for participants. The failure, due to the robot incorrectly pulling the target to its pre- defined position was identified and correctedbut at a cost.

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GPS a separate incident Door #3 Shelf 1 Shelf 2 Shelf 3 Left 1Right 2 Pre-programmed pick and place cycle Pre-defined locations E.g. Take target from Front End to door position 322 Incident occurred because 321 coordinates were saved as position 322. Human error? Overwritten valuesSave as!! Program manipulation error, software? Action: Do not use this shelf position this year. Test other shelf positions without target before use. Re-program robot correctly during next shutdown.

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Operation - Incidents GPS.FC490 Bent due to collision with deflector plate. Interlocks overridden? Beam losses in BTY line/protons on converter Caused a reduction in p-beam intensity during Ag run in May/June. Vacuum control problems including RFQ vacuum Initiated by CERN-wide power cuts Water in the hall Condensation in the air conditioning equipment situated above the control room. Excessive sparking at FEs Dehumidifier fuse Including dirty extraction electrode tip. HRS.FC20 isolated because of impossibility to move it. Failure to remove target #415 from HRS FE#3 last week. Nmr resets on HRS magnets Failure of plcs for target and ion source power supplies Including 24V power supply failures Linac 2 vacuum leak Repair of septa magnet in PS

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Operations Despite all the problems, an overall successful year for physics at ISOLDE. Thanks to the contributions of all the support groups involved More support from other groups: BE-CO, TE-MSC, EN-ICE, EN-MME, PH-ADO and all those boarding the HIE-ISOLDE project.

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Safety Two issues that have triggered a change in the approach to safety at ISOLDE. The Internal Safety Audit and their recommendations The failure of the HRS Robot to correctly retrieve a used target x 2.

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Internal Safety Audit An exercise recommended by the management for all installations at CERN ISOLDE being the first after the LHC A series of meetings between the appointed auditors and the various groups associated with the operation of ISOLDE A report published with recommendations for different departments The inter-departmental sharing of tasks between the DSOs of EN and BE with respect to ISOLDE remains to be formalized at the level of the Sector. shall finalise the inventory of hazards and document the control measures (procedures and systems) that all interventions under their responsibility are carried out following the optimization principles stipulated in the Safety Code F. ALARA: As Low As Reasonably Achievable and the adoption of the ALARA Committee.

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Robot Incidents Three reports produced. Presented at FOM (Facilities Operation Meeting), IEFC (Injectors and Experimental Facilities Committee). Used as an example to endorse the adoption of the DIMR: Dossier DIntervention en Milieu Radioactif Relatively new procedure to the PS complex still under approval. Combined with an ALARA committee Different procedures according to radiation levels/contamination/expected absorbed dose of participants Most interventions at ISOLDE are Level 3 (highest). Timely. No more quick interventions without completing the DIMR. Knock on effects for operation.

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Shutdown Planning 2009/2010 2 major interventions projected for the shutdown 2009/2010. Replacement of the HRS FE#3 by FE#6 Including Boris tube insulators and cables Motivation: FE#3 has gone beyond its expected lifetime in terms of absorbed radiation dose. Installation in controlled conditions. Failure of HRS Frontend to decouple actual target as from last Wednesday. Renovation of vacuum system controls All vacuum sections of ISOLDE excluding REX Motivation: frequent vacuum control breakdowns, aging and obsolete equipment. Benefit from support from the Vacuum Group.

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20ISOLDE WORKSHOP The New ISOLDE Frontends Stefano Marzari & EN-STI-RBS team Frontends (1, 2), 3, 4Frontends (5), 6, 7

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Front End #6 Improvements See presentations by S. Marzari and T. Giles in ISOLDE workshop Smaller volume Improved optics Linear potentiometers Ceramic insulator Improved alignment system Detachable front part Compressed air motors New controls

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Boris Tube Insulators The removal of the Front end provides a unique opportunity to replace the repaired insulator (2007). Implies a complete exchange of the cabling through the BT Salle HT Faraday cage HRS Boris tube Sparateur HRS

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Planning of FE exchange Phase 1 - Removal of FE#3 13 th 15 th January Phase 2 - Removal of Boris tube cables and insulator exchange 18 th 22 nd January Phase 3 - Cabling of BT and ground elements 25 th January 12 th February Phase 4 - Installation of FE#6, alignment 15 th 19 th February Phase 5 - Coupling, vacuum and electrical 22 nd 24 th February Phase 6 - Tests, mechanical, vacuum, power 3 rd March -> Key dates Cold check out 5 th April Off-line run 19 th April Protons to ISOLDE 26 th April Warning: Planning subject to change according to progress on both FE installation and vacuum controls upgrade progress!!

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Vacuum Complete renewal of ISOLDE vacuum controls Collaboration between TE- VSC and EN-ICE New plcs, controllers and crates New vacuum controls - PVSS Major cabling overhaul Work already started on unused beam-lines Once startedno looking back! PID for ISOLDE Courtesy of G. Vandoni

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Courtesy of S. Blanchard Main Controlled Equipments 200 Valves 120 Gauges 50 Pumps 110 Crates New Cables (Installation EN/EL) Tunnel HRS/GPS : 70 Cables Hall : 155 Cables CR&Primaire RA : 60 Cables Vacuum

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News from Support Groups BE-OP Employment of D. Voulot as from 1 st January 2010. PH-SME Employment of technician J. Thiboud (2 years) for WITCH and REX SC-RP Supplementary RP technician for shutdown period. EN-STI Successful negotiation of 2 Fellows in collaboration with ESS, Lund. Target area upgrade and liquid metal loop project. Approval of 3.5MCHF for target area upgrade project starting 2010. Opening of post for a Safety Engineer within EN-STI-RBS Technical student starting today (6 months) for safety file of ISOLDE. Opening of post for Laser Physicist in EN-STI-LP Increase in general consolidation to 250kCHF for 2010.

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Courtesy of Y. Kadi and M. Pasini

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HIE-ISOLDE Schedule Important milestones for Energy Upgrade: Start project Jan 1 st 2010 Cryogenics building ready Dec 2011 Installation infrastructures completed Dec 2012 Cryogenics installed and commissioned Jun 2013 High energy beam line (5.5 MeV/u) installed by March 2013 Full Linac (10 MeV/u) installed by Jan 2014 Commissioning completed by June 2014 inline with L4 and PSB commissioning (Oct. 2013 to July 2014)

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Current Cost The current cost of HIE-ISOLDE 1 is 36 MCHF materials and 124 FTE (71 staff + 53 Fellows/Phd) This includes the beam quality improvement and part of the linac design study & prototyping costs (5 MCHF including FTE) that have already been spent, and necessary consolidation costs. Of the assured external funding (see below) 5 MCHF remains unspent Materials MCHFstaffFellows/students Beam quality improvements4 Prototyping, Linac up to 5.5 MeV/u 82126 Infrastructure, management and safety 14307 Linac up to 10 MeV/u863 Design study for intensity upgrade 21417

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R&D activity on HIE-LINAC Y. Kadi HIE-ISOLDE Proposal, IEFC, August 21, 2009 RF Beam dynamics studies High cavity prototype Copper substrate manufacturing Chemical etching Nb sputtering RF sub-system prototypes Tuner Power coupler SC solenoid prototype Cryomodule design In parallel preparation of a test stand for QWR at CERN

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Cage de faraday Zone au rez de chauss libre

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High beta cavity final welding and cleaning THPPO010 M. Pasini SRF09 Berlin, 20-25.09 2009

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SC solenoid prototype (Nb3-Sn technology) Magnetic length0.16m B 2 dz>16.2T2mT2m Max mechanical length

Summary (2/2) Fellow for RF Cavity Tests => launch fabrication of 5 series cavities (50% paid by SPL) Fellow for Cryomodule detailed design due by mid-2010 Fellow for radiation protection => validate layout Prepare Resource-loaded Plan for CERN Management => release resources as early as possible (mid-2010/2011) If construction starts by mid-2010, then installation and commissioning of the first 2 cryo- modules for 2013 M. Pasini SRF09 Berlin, 20-25.09 2009

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Research Training Themes Addressed by this ITN Proposal Y. Kadi HIE-ISOLDE Proposal, IEFC, August 21, 2009 HIE-ISOLDE SubsystemResearch Training Theme No. ESR No. ER I. Linac 1. Super-conducting Cavity RF (LLRF system)1- 2. Super-conducting Cavity manufacturing1- 3. Beam Instrumentation11 4. Transfer Line magnets1- 5. Linac Integration1- 6. Linac Alignment1- 7. Single Cavity and complete Cryomodule tests1- 8. Linac commissioning and control applications development 1- II. Design Study for intensity upgrade 9. Target Material Development1- 10. Target design2- 11. High voltage and high current systems1- 12. Extraction optics and front-end design1- 13. Cooling and ventilation1- 14. Vacuum systems1- 15. Low-Level controls1- 16. Off-line separator and HRS magnet1- 17. RFQ cooler and Pre-separator1- 18. Beam lines (REX-EBIS studies)1- III. Safety 19. Radiation protection systems for the Linac.-1 20. Radiation protection studies for the Intensity Upgrade1-

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Thank you for your attention